Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS2339754 A
Publication typeGrant
Publication date25 Jan 1944
Filing date4 Mar 1941
Priority date4 Mar 1941
Publication numberUS 2339754 A, US 2339754A, US-A-2339754, US2339754 A, US2339754A
InventorsBrace Porter H
Original AssigneeWestinghouse Electric & Mfg Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Supervisory apparatus
US 2339754 A
Abstract  available in
Images(2)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Jan. 25, 1944. EH. BRACE S UPERVISORY APPARATUS Filed March 4, 1941 2 Sheets-Sheet 2 INVENTOR Porky/(Brace.

1 ATTORNE WITNESSES:

(W fir v Patented Jan. 25, 1944 UNITED STATES PATENT OFFICE- SUPERVISOR/Y APPARATUS Porter H. Brace, Forest Hills, Pa., assignor' to Westinghouse Electric & Manufacturing Company, East Pittsburgh, Pa., a corporation of Pennsylvania Application March 4, 1941, Serial No. 381,672

. 3 Claims.

This invention relates to devices useful for the control of metallurgical processes, and more particularly to supervisory apparatus for indicating the progress of chemical reactions due to combustion at high temperatures.

The primary object of this invention is to utilize the radiation properties accompanying combustion for indicating the progress of the combustion process.

Another object of the invention is to analyze the combustion process by means of the radiation such manner, as to produce an instantaneous visual indication proportional to the intensity of ance with the operation of the arrangement shown in Fig. 5.

In metallurgical operations involving accelerated oxidation reactions, for example, in combustion processes involving high temperatures, the radiations from the flames of gaseous or solid products are frequently depended upon as a.

means for estimating the progress of the reaction in order to decide upon the measures for controlling the process. For example, in producing steel by means of the Bessemer converter, it is the practice to depend upon the trained eye of the individual in charge of the control of the operation. Very accurate timing is necessary to main tain satisfactory uniformity in the product and the inevitable human error frequently leads to so-called off heats resulting in considerable economic losses. In accordance with the invention herein described a continuous indication can be efiected of the changing distribution of the radiation from the flame of a converter.

istics and spectral components of the radiation to be analyzed and proportional to the radiation of a standard source, and utilize said impulses in a predetermined order and sequence of time to form a pattern on the screen of a cathode ray oscilloscope.

Other objects and advantages will be apparent from the following description of the invention pointed out in particularity by the appended claims and taken in connection with the accompanying drawings in which:

Figure 1 is a schematic view of one embodiment of the invention for analyzing the general radiation of a flame;

Fig. 2 is a modified arrangement for analyzing the spectral radiation of a flame;

Fig. 3 shows the resultant pattern in accordance with the operation of the embodiment shown in Fig. 4 illustrates the pattern resultant from the operation of the arrangement of Fig. 2';

Fig. 5 is a schematic view of the apparatus for analyzing simultaneously the total radiation characteristics, the spectral radiation, and the rate of change of the radiation incident on a point of observation, e. g. a slit at the focus of the optical system cooperating with a photo-cell; and,

Fig. 6 illustrates the pattern obtained in accord- Referring to Fig. 1, a Bessemer converter I is schematically indicated, the flame of which emits visible, infrared and ultraviolet radiations. These radiations are passed through an optical system indicated by the lens 2 and through a suitable diaphragm 3 and are directed upon a second lens 4 which focuses the beam on a photo-cell 5. The anode and cathode elements 6 and 1, respectively of the cell 5 are connected to the vertical sweep circuit of'a cathode ray oscilloscope 21.

Oscilloscopes of this type are standard instruments for comparing variousproperties of alternating currents and serve as a useful tool in the 'fields of research and industry. The invention does. not concern itself with the particular type of oscilloscope and therefore its mechanical or electrical features need not be described in detail. It is to be understood that the oscilloscope contains elements for producing an adjustable linear time axis for the horizontal sweep of the cathode 4 ray and that the currents to be traced-cause vertical movement of the cathode ray.

A scanning mechanism comprising a series of alternating light filtering elements 8, and opaque members 9 is interposed between the diaphragm 3 and the lens 4. The filter members and the opaque members are so arranged as to form a revolving drum which may be rotated at a uniform speed by the motor Ill through suitable gearing. In order to synchronize the sweep of the oscilloscope with the rotation of the scanning mechanism, a small permanent magnet H is carried thereby and is arranged to cooperate with an inductance coil I? to deliver a voltage pulse to the sweep control of the oscilloscope on each revolution 01' the scanning mecha- The opaque members 9 acting as shutters for the light from the radiation of the flame, carry reflecting surfaces l3, which are at such an angle as to reflect upon the photo-cell 5 the radiation from a standard source shown here by the lamp I, the illumination of which is focused by means of the lens it upon the reflecting surfaces when one of them obstructs the opening of the diaphragm 3. The illumination is arranged by proper physical placement of the light source I in such manner that an opaque member 3 will cut of! the light beam when a filtering element 8 is directly opposite the opening of the diaphragm 3. The number of opaque members 9 around the circular support is so arranged that whenever a filtering element is placed directly opposite the opening in the diaphragm 3, an opaque member cuts oil the light from the source l4. On the other hand, whenever an opaque member 9 is directly opposite the opening in the diaphragm 3 and thereby cuts oil the light entering from the lens 2, a filtering element 8 will be so positioned that light from the source ll must pass therethrough. The light beam passing through the filter 8 being directed to the center 'of the opening in the diaphragm 3 encounters a reflector surface I 3 from which it is then reflected and directed through the lens onto the photocell 5. As the drum revolves .the next instant, a filtering member will take the place of the opaque member before the opening in the diaphragm 3, and at the same time an opaque member 9 will take the place of the filter member 8 before the lens l5 and thereby cut off the light from the source I. It is clearly seenv that in alternate succession the photocell will be energized from the light source to be analyzed and the standard source I4. Each-of the light filtering elements 8, has difierent predetermined spebtral transmittance and they are so arranged that as the scanning mechanism rotates each successive filter progressively completes the desired spectrum.

In the operation of the apparatus above described when the scanning mechanism is rotating the photo-cell receives interrupted illumination whose magnitudes depend upon the intensity of the radiation of the flame and the.

transmission coeflicients of the filters. The

photo-cell also receives a series of impulses origi nating from the standard source M in alternate succession. This results in a pattern on the oscilloscope screen I 6 as shown in Fig. 3 where the series of deflections N of the cathode ray beam differ in amplitude alternatingly from a series of deflections 0. The former are due to the energization of the photo-cell from the radiation source to be analyzed and the latter from the constant source M. For the purpose of comobtained through the use of suitable prisms or gratings to develop the line" spectrum of the radiation. By this is meant the successive viewing of the spectral lines of the flame as they are developed by a refracting prism, diffraction grating or equivalent optical element. A different type of scanning system is employed for this purpose as shown in Fig. 2. Radiation from the converter flame is focused on a slit 20 by a suitable optical system represented here by the lens 2|. The light is focused by another lens 22 upon a refracting prism 23, from which it is directed on the scanning mechanism 24. The latter con-- put of the latter is connected to the vertical deflecting circuit of a cathode ray-oscilloscope in the same manner as shown in Fig. 1. An amplifier l9 may be interposed between the photo cell 5 and the oscillograph 21 if the output of the photo-cell should not be of sufilcient ma nitude to energize the oscilloscope. The rotation of the scanning mechanism by the motor l0 causes the spectral radiation to sweep across the opening of the light gate 28 every time one of the reflecting surfaces 25 is in proper alignment therewith. Thus the radiation reaching the photo-cell varies with time during the movement of the spectrum across the opening of the light gate andin such a manner that it is dependent upon the spectral distribution of the radiation. The alternate reflectors 26 of thescanning mechanism are so positioned that they deflect the spectrum away from the light gate while reflecting the light from a standard source shown here by the lamp M in cooperation with the lens l5 upon the light gate as the scanning mechanism rotates.

The timing of the oscilloscope sweep is controlled as in Fig. 1 by a series of permanent magnets II and inductance i2 so that the oscilloscope sweep returns to its starting point after the passage of each pair of deflecting surfaces. The result is that the oscilloscope receives the series of impulses from the photo-cell evoked alternately by the light from the standard source and the radiation from the converter flame. The resultant pattern on the oscilloscope screen will be of the type shown in Fig.4 where the portion A represents a steady deflection due to the standard radiation and the portion B a variable defiec'tion due to the passage of successive spectral regions of the flame radiation across the light gate. In the operation the oscilloscope sensitivity is to be adjusted to keep the deflection due to the standard radiation at some predetermined parison the sensitivity of the oscilloscope may be adjusted by the control I! until the deflections due to the standard radiation reach some predetermined amplitude which is indicated by the mark Q. The standard source It mayconveniently be a tungsten filament lamp with means for accurately measuring and adjusting the filament current. The motor ill for driving the scanning mechanism should have a reasonably constant speed.

The above arrangement provides continuous spectral analysis of a chosen portion of the spectrum of a flame. Greater discrimination may be amplitude value as indicated by the mark (1" Itfrequently happens that significant lines of the spectrum are obscured by general radiation which gives a more or less continuou background of high intensity. Such radiation might arise from incandescent solid particles in suspension in the flame gases. In order to separate the lines from the continuous background, and provide a flexible arrangement in'which the general radia tion and the spectral lines can be simultaneously observed, together with some indication of the progress of reaction, the arrangement shown in. Fig. 5 can be utilized. By this modification 01.

tion ofthe total radiation from the flame as a' a 3. A third sweep records the rate of change of radiation reaching the photo-cell slit and thus serves to emphasize spectral lines with respect to the general background.

Radiation from the source shown herein as the flame of a Bessemer converter is focused by means of lens 2 on a spectroscom: I8 from which the dispersed light emerges and is directed upon a scanning mechanismcomprisin-g a polyhedral mirror 29 having two identical facets 39 and 30' and another facet 3i disposed in a different angular position; The mirror 29 is driven by a motor to by means of gears 34 and 35. The

and 4| are open. The output of the photo-cell will be connected directly through conductors 45 and 48, the stationary. contacts of the switch 43 and conductors 49 and 41 to the input of the oscilloscope.

The operation is repeated in uniform sequence, and the resultant pattern on the oscilloscope screen will be as shown in Fig. 6, comprising three distinctive cathode ray sweep lines, D being that gear drive is merely for the purpose of illustration and other suitable driving mechanisms may be employed. Another gear 36 similar in size to gear is in mesh with the latter and rotates a cam 31 upon which ride the rollers 38, 39 and 40 each actuating a switch 4|, 43 and 42, respectively. The moving contacts of the switches 4|.

- 42 and 43 are connected in parallel by means of conductors 45 and 49 and connect to the output of the photo-cell 5 through a suitable amplifier l9. The stationary contacts of th switches 4| and 43 are connected in parallel by means of conductors 41 and 48 and connect to the input circuit of the oscilloscope 21 and also to the secondary-winding 49 of a transformer 50 the primary winding 5! of which is connected to the stationary contacts of the switch 42.

The synchronization of the oscilloscope sweep is effected as previously described by means of magnets ll carried by the gear 35 cooperating with inductance coil 12. The facets 30 and 90' of the mirror 29 are so arranged that the light from the spectroscope I8 is reflected thereby upon the light gate behind which is the photocell 5, whereas the facet 3| is in such angular position that it reflects the light from the stand- .ard source l4 focused by the lens I! upon-the light gate 28.

The mirror 29 is so geared to the cam 31 that I the switches 4!, 42 and 43 are closed in succession during the intervals when the photo-cell is of the radiation of the standard source, E a record of the spectral lines of the general radiation, and F, a record of the rate of change of the radiation when the transformer is in operation.

I claim as my invention? 1. In an apparatus for determining the radiation characteristics of a radiant source, means for directing the radiation of said source upon a photoelectrically responsive element in periodic succession through a plurality of filters having predetermined spectral transmittance, means conjointly' operable with said directing means for exposing said element at intervals of said periodic succession to radiation of known value and means for indicating in visually comparative relation the magnitudes of the response of said element to both said radiations.

2. In an apparatus for determining the radi-- through said translucent members, a source of.

constant radiation of known value, means carried by said scanning mechanism and operable upon intervals at which time-said opaque members intercept the'radiation of said flrst mentioned source, for directing the radiation of said source of known value upon said element, and means for indicating in visually comparative relation the magnitudes of the response of said element to both said radiations.

3. In an apparatus for determining the process of combustion by means of. the radiation characteristics of the flame, a rotating scanningmechanism comprising a plurality of translucent and illuminated. In Fig. 5 the position illustrates the instant when the record of the general radiation of the flame is being indicated, the facet 30 sweeping over the light gate, andthe switch 4| being closed; with therotation as indicated by the arrow the next event will be the indicationof the spectral lines as distinguished from the general radiation; The radiation from the spectroscope will be reflected by thefacet 80' of the mirror 29 while the cam- 3'I will have closed the switch 42s0 that the impulse from the photo-* electric cell 5 will be transmitted to the cathode ray tube through the transformer B9. The transformer, due to its characteristics, will'develop signals which are proportional to the rate of change of the radiation at any instant rather than to its intensity. As the rotation continues the next occurrence is-tha't the facet Si is placed in operative relation between the light gate 20 and the source i4, sweeping the light gate by the standard radiation. At this time the switch 4! is in the closed position whereas switches 42 opaque members in alternate order upon a revolving support, a diaphragm cooperating therewith whereby the radiation of the flame is di-.

rected upon said mechanism, a photoelectric cell disposed behind said support and adapted to be energized by the light values transmitted through said translucent members and deenergized in successively alternate order by said opaque memberscovering saidodiaphragm, said translucent 'members' having progressively increasing spectral transmittance of predetermined light filtering value, a, source of constant radiation of known value, means including reflectors carried by said opaque members for directing the radiation of said source upon saidcell at intervals when said opaque members intercept the radia tion of said flame, and means for indicating the electrical eflect produced by said cell upon energization from both said radiations comprising a cathode ray oscilloscope.

PORTER H. BRA CE.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2444560 *15 Apr 19446 Jul 1948Du Mont Allen B Lab IncCathode-ray tube spectrograph
US2602368 *13 Sep 19508 Jul 1952Gen ElectricColor matching apparatus
US2648723 *30 Dec 194811 Aug 1953Rca CorpInspection system
US2824972 *20 Apr 195325 Feb 1958American Optical CorpSpectrographic apparatus
US2840146 *26 Oct 195324 Jun 1958Gen Controls CoFlame detecting means
US2981062 *21 May 195725 Apr 1961Arnoux CorpMethod and apparatus for safe operation of engines
US2991684 *31 Jul 195611 Jul 1961Max Planck Inst EisenforschungMethod of supervising metallurgical and metal melting processes
US3087986 *8 Jul 195830 Apr 1963IttOptical search system
US3121160 *13 Nov 196111 Feb 1964Phillips Petroleum CoElectrical measuring apparatus
US3146822 *9 Sep 19601 Sep 1964IttFlame detection system using oscillating element
US3198062 *12 May 19603 Aug 1965Frederick G Keyes IncFlame photometers
US3219803 *8 Jan 196223 Nov 1965Phillips Petroleum CoElectrical measuring apparatus
US3271558 *19 Feb 19656 Sep 1966Davis Billy KSpectral method for monitoring atmospheric contamination of inert-gas welding shields
US3276506 *1 Jun 19644 Oct 1966Apparatcbau Eugen Schrag KommaBurner control device
US4328488 *19 Dec 19794 May 1982Tokyo Shibaura Denki Kabushiki KaishaFlame-detecting apparatus including a field-limiting device
US6788408 *4 Feb 20037 Sep 2004Parviz TayebatiWavelength monitoring system
US698029916 Oct 200227 Dec 2005General Hospital CorporationSystems and methods for imaging a sample
US714897025 Aug 200512 Dec 2006The General Hospital CorporationSystems and methods for imaging a sample
US723124330 Oct 200112 Jun 2007The General Hospital CorporationOptical methods for tissue analysis
US731015010 Jan 200318 Dec 2007The General Hospital CorporationApparatus and method for low coherence ranging
US735571624 Jan 20038 Apr 2008The General Hospital CorporationApparatus and method for ranging and noise reduction of low coherence interferometry LCI and optical coherence tomography OCT signals by parallel detection of spectral bands
US736585912 Sep 200529 Apr 2008The General Hospital CorporationSystem and method for optical coherence imaging
US736637629 Sep 200529 Apr 2008The General Hospital CorporationSystem and method for optical coherence imaging
US73829492 Nov 20053 Jun 2008The General Hospital CorporationFiber-optic rotational device, optical system and method for imaging a sample
US74181691 Feb 200726 Aug 2008The General Hospital CorporationApparatus for controlling at least one of at least two sections of at least one fiber
US74474081 Jul 20054 Nov 2008The General Hospital CorproationImaging system and related techniques
US75190964 Jun 200414 Apr 2009The General Hospital CorporationProcess and apparatus for a wavelength tuning source
US75388591 Feb 200726 May 2009The General Hospital CorporationMethods and systems for monitoring and obtaining information of at least one portion of a sample using conformal laser therapy procedures, and providing electromagnetic radiation thereto
US755129324 Nov 200423 Jun 2009The General Hospital CorporationMethod and apparatus for three-dimensional spectrally encoded imaging
US756734931 Mar 200428 Jul 2009The General Hospital CorporationSpeckle reduction in optical coherence tomography by path length encoded angular compounding
US763008313 Dec 20078 Dec 2009The General Hospital CorporationApparatus and method for ranging and noise reduction of low coherence interferometry LCI and optical coherence tomography OCT signals by parallel detection of spectral bands
US764315213 Dec 20075 Jan 2010The General Hospital CorporationApparatus and method for ranging and noise reduction of low coherence interferometry LCI and optical coherence tomography OCT signals by parallel detection of spectral bands
US764315313 Dec 20075 Jan 2010The General Hospital CorporationApparatus and method for ranging and noise reduction of low coherence interferometry LCI and optical coherence tomography OCT signals by parallel detection of spectral bands
US772478611 Apr 200825 May 2010The General Hospital CorporationProcess and apparatus for a wavelength tuning source
US77334978 Sep 20048 Jun 2010The General Hospital CorporationMethod and apparatus for performing optical imaging using frequency-domain interferometry
US77421735 Apr 200722 Jun 2010The General Hospital CorporationMethods, arrangements and systems for polarization-sensitive optical frequency domain imaging of a sample
US776113926 Jan 200420 Jul 2010The General Hospital CorporationSystem and method for identifying tissue using low-coherence interferometry
US77824644 May 200724 Aug 2010The General Hospital CorporationProcesses, arrangements and systems for providing a fiber layer thickness map based on optical coherence tomography images
US779627010 Jan 200714 Sep 2010The General Hospital CorporationSystems and methods for generating data based on one or more spectrally-encoded endoscopy techniques
US779711913 Dec 200714 Sep 2010The General Hospital CorporationApparatus and method for rangings and noise reduction of low coherence interferometry LCI and optical coherence tomography OCT signals by parallel detection of spectral bands
US78092255 Sep 20085 Oct 2010The General Hospital CorporationImaging system and related techniques
US78092265 Sep 20085 Oct 2010The General Hospital CorporationImaging system and related techniques
US784357229 Sep 200630 Nov 2010The General Hospital CorporationMethod and apparatus for optical imaging via spectral encoding
US784794929 Sep 20067 Dec 2010The General Hospital CorporationMethod and apparatus for optical imaging via spectral encoding
US785967931 May 200628 Dec 2010The General Hospital CorporationSystem, method and arrangement which can use spectral encoding heterodyne interferometry techniques for imaging
US78652311 May 20024 Jan 2011The General Hospital CorporationMethod and apparatus for determination of atherosclerotic plaque type by measurement of tissue optical properties
US787275730 Sep 200918 Jan 2011The General Hospital CorporationApparatus and method for ranging and noise reduction of low coherence interferometry LCI and optical coherence tomography OCT signals by parallel detection of spectral bands
US787275929 Sep 200618 Jan 2011The General Hospital CorporationArrangements and methods for providing multimodality microscopic imaging of one or more biological structures
US788934813 Oct 200615 Feb 2011The General Hospital CorporationArrangements and methods for facilitating photoluminescence imaging
US790325712 Dec 20078 Mar 2011The General Hospital CorporationApparatus and method for ranging and noise reduction of low coherence interferometry (LCI) and optical coherence tomography (OCT) signals by parallel detection of spectral bands
US791162118 Jan 200822 Mar 2011The General Hospital CorporationApparatus and method for controlling ranging depth in optical frequency domain imaging
US792027124 Aug 20075 Apr 2011The General Hospital CorporationApparatus and methods for enhancing optical coherence tomography imaging using volumetric filtering techniques
US79251335 Sep 200812 Apr 2011The General Hospital CorporationImaging system and related techniques
US793302130 Oct 200826 Apr 2011The General Hospital CorporationSystem and method for cladding mode detection
US794901917 Jan 200824 May 2011The General HospitalWavelength tuning source based on a rotatable reflector
US796957813 Jun 200828 Jun 2011The General Hospital CorporationMethod and apparatus for performing optical imaging using frequency-domain interferometry
US798287921 Feb 200719 Jul 2011The General Hospital CorporationMethods and systems for performing angle-resolved fourier-domain optical coherence tomography
US799521021 Nov 20059 Aug 2011The General Hospital CorporationDevices and arrangements for performing coherence range imaging using a common path interferometer
US799562730 Nov 20099 Aug 2011The General Hospital CorporationProcess and apparatus for a wavelength tuning source
US801859823 Jul 200413 Sep 2011The General Hospital CorporationProcess, system and software arrangement for a chromatic dispersion compensation using reflective layers in optical coherence tomography (OCT) imaging
US803220021 Sep 20064 Oct 2011The General Hospital CorporationMethods and systems for tissue analysis
US804060829 Aug 200818 Oct 2011The General Hospital CorporationSystem and method for self-interference fluorescence microscopy, and computer-accessible medium associated therewith
US804517717 Apr 200825 Oct 2011The General Hospital CorporationApparatus and methods for measuring vibrations using spectrally-encoded endoscopy
US80507478 Aug 20081 Nov 2011The General Hospital CorporationMethod and apparatus for determination of atherosclerotic plaque type by measurement of tissue optical properties
US805446813 Dec 20078 Nov 2011The General Hospital CorporationApparatus and method for ranging and noise reduction of low coherence interferometry LCI and optical coherence tomography OCT signals by parallel detection of spectral bands
US80813168 Aug 200520 Dec 2011The General Hospital CorporationProcess, system and software arrangement for determining at least one location in a sample using an optical coherence tomography
US809786426 Jan 201017 Jan 2012The General Hospital CorporationSystem, method and computer-accessible medium for providing wide-field superresolution microscopy
US81159192 May 200814 Feb 2012The General Hospital CorporationMethods, arrangements and systems for obtaining information associated with a sample using optical microscopy
US814501817 Jan 200727 Mar 2012The General Hospital CorporationApparatus for obtaining information for a structure using spectrally-encoded endoscopy techniques and methods for producing one or more optical arrangements
US814941822 Oct 20103 Apr 2012The General Hospital CorporationMethod and apparatus for optical imaging via spectral encoding
US81504968 Aug 20083 Apr 2012The General Hospital CorporationMethod and apparatus for determination of atherosclerotic plaque type by measurement of tissue optical properties
US817470227 Jul 20098 May 2012The General Hospital CorporationSpeckle reduction in optical coherence tomography by path length encoded angular compounding
US81756854 May 20078 May 2012The General Hospital CorporationProcess, arrangements and systems for providing frequency domain imaging of a sample
US820899524 Aug 200526 Jun 2012The General Hospital CorporationMethod and apparatus for imaging of vessel segments
US828952210 Nov 201016 Oct 2012The General Hospital CorporationArrangements and methods for providing multimodality microscopic imaging of one or more biological structures
US835166528 Apr 20068 Jan 2013The General Hospital CorporationSystems, processes and software arrangements for evaluating information associated with an anatomical structure by an optical coherence ranging technique
US835513827 Jul 201115 Jan 2013The General Hospital CorporationMethod and apparatus for performing optical imaging using frequency-domain interferometry
US836966911 Apr 20115 Feb 2013The General Hospital CorporationImaging system and related techniques
US838490715 Nov 201026 Feb 2013The General Hospital CorporationMethod and apparatus for optical imaging via spectral encoding
US83849097 Jun 201026 Feb 2013The General Hospital CorporationMethod and apparatus for performing optical imaging using frequency-domain interferometry
US841681814 Jun 20119 Apr 2013The General Hospital CorporationProcess and apparatus for a wavelength tuning source
US85590127 May 201215 Oct 2013The General Hospital CorporationSpeckle reduction in optical coherence tomography by path length encoded angular compounding
US85936197 May 200926 Nov 2013The General Hospital CorporationSystem, method and computer-accessible medium for tracking vessel motion during three-dimensional coronary artery microscopy
US86760134 Feb 201318 Mar 2014The General Hospital CorporationImaging system using and related techniques
US870504619 Dec 201222 Apr 2014The General Hospital CorporationMethod and apparatus for performing optical imaging using frequency-domain interferometry
US872107726 Apr 201213 May 2014The General Hospital CorporationSystems, methods and computer-readable medium for determining depth-resolved physical and/or optical properties of scattering media by analyzing measured data over a range of depths
US87606632 Apr 201224 Jun 2014The General Hospital CorporationMethod and apparatus for optical imaging via spectral encoding
US88041267 Mar 201112 Aug 2014The General Hospital CorporationSystems, methods and computer-accessible medium which provide microscopic images of at least one anatomical structure at a particular resolution
US881814922 Mar 201226 Aug 2014The General Hospital CorporationSpectrally-encoded endoscopy techniques, apparatus and methods
US883821319 Oct 200716 Sep 2014The General Hospital CorporationApparatus and method for obtaining and providing imaging information associated with at least one portion of a sample, and effecting such portion(s)
USRE4387525 Nov 200825 Dec 2012The General Hospital CorporationSystem and method for optical coherence imaging
USRE4404224 Nov 20085 Mar 2013The General Hospital CorporationSystem and method for optical coherence imaging
WO2002054027A1 *27 Dec 200111 Jul 2002Coretek IncWavelength monitoring system
WO2005001401A2 *4 Jun 20046 Jan 2005Gen Hospital CorpProcess and apparatus for a wavelength tuning source
Classifications
U.S. Classification356/417, 356/308, 250/206, 250/226, 250/554